Just found out to my major disgust that Google has eliminated bulk sheets, even for very large advertisers.
My account rep just said that we could do everything in the Adwords editor that could be done with bulksheets.
I proceeded to ask her how to do 3 different things, that were extraordinarily simple with a bulksheet, none of which she could figure out using the editor.
In my opinion, I have never seen a single good reason to use the editor. Anything it can do, I can do as quick in the main account. I guess if I wanted to make a lot of changes while flying on an airplane then the editor might be useful. The few times I have tried to use it for something it was absolutely sluggish and changes took forever to go live.
The one and only reason I can even imagine why this was done is that, we would make tons of changes in Google and then just download the bulksheet and send it to Yahoo. Maybe Google got tired of helping Yahoo drive more traffic. At the same time, they stopped helping me drive more traffic through them.